Noratrieb/101844-repro
1
0
Fork 0
mirror of https://github.com/Noratrieb/101844-repro.git synced 2026-01-14 14:25:02 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions

simplify

Browse source
This commit is contained in:
nora 2022-09-15 23:04:01 +02:00
parent 236cac18c2
commit 6db8f7942b
1 changed files with 12 additions and 37 deletions
Download patch file Download diff file Expand all files Collapse all files

49
tower/src/lib.rs
View file

@ -1,39 +1,25 @@
use std::marker::PhantomData;
use std::pin::Pin;
use core::ops::DerefMut;
trait Stream { trait Stream {
type Item; type Item;
} }
impl<P> Stream for Pin<P>
where
P: DerefMut,
P::Target: Stream,
{
type Item = <P::Target as Stream>::Item;
}
trait TryStream: Stream { trait TryStream: Stream {
type Ok; type TryItem;
} }
impl<S, T> TryStream for S impl<S, T> TryStream for S
where where
S: ?Sized + Stream<Item = T>, S: ?Sized + Stream<Item = T>,
{ {
type Ok = T; type TryItem = T;
} }
trait Discover { trait Discover {
type Service; type Service;
} }
impl<K, S, D: ?Sized> Discover for D impl<S, D: ?Sized> Discover for D
where where
D: TryStream<Ok = (K, S)>, D: TryStream<TryItem = S>,
K: Eq,
{ {
type Service = S; type Service = S;
} }
@ -48,7 +34,7 @@ pub trait MakeService {
} }
struct Balance<D, Req> { struct Balance<D, Req> {
_req: PhantomData<(D, Req)>, _dreq: (D, Req),
} }
impl<D, Req> Balance<D, Req> impl<D, Req> Balance<D, Req>
@ -66,33 +52,22 @@ impl<D, Req> Service<Req> for Balance<D, Req> {
type Error = (); type Error = ();
} }
struct PoolDiscoverer<MS> impl<MS> Stream for MS
where where
MS: MakeService, MS: MakeService,
{ {
_x: MS, type Item = SvcWrap<MS::Service>;
} }
impl<MS> Stream for PoolDiscoverer<MS> pub fn broken<MS>()
where where
MS: MakeService, MS: MakeService,
MS::Error: Into<()>,
{ {
type Item = (usize, SvcWrap<MS::Service>); let d: MS = todo!();
}
pub struct Builder; // Error: Apparently Balance::new doesn't exist during MIR validation
let _ = Balance::new(d);
impl Builder {
pub fn build<MS, Request>()
where
MS: MakeService,
MS::Error: Into<()>,
{
let d: PoolDiscoverer<MS> = todo!();
// THE CRITICAL STATEMENT
let _ = Balance::new(Box::pin(d));
}
} }
struct SvcWrap<Svc>(Svc); struct SvcWrap<Svc>(Svc);